It comes up as WCA Solutions on my phone, WCA Advertisement, and "unavailable".  I found this domain registration info with a contact in NJ. Don't know if it has anything to do with it (interestingly, I had a missed call from Carteret NJ just before WCA called me).  I looked up the administrative contact for WCA-Solutions.com, Daria Marsh, on facebook and she works for T-Mobile. Weird. However, I'm not sure if the admin contact info listed on the web is for the website domain company, or the WCA.  

I've read on another website that WCA isn't the name of the actual company just the carrier, but I find that hard to believe.  When I called an 800 # to supposedly "opt out" from receiving calls, it said I had been unregistered from "WCA" so I think that is the name they go by.  

Registrant:
--
1402 Forest Haven Blvd
Edison, nj 08817
US

Domain name: WCA-SOLUTIONS.COM

Administrative Contact:
   Marsh, Daria  
   1402 Forest Haven Blvd
   Edison, nj 08817
   US
   9089171333